01 - Preheat the oven to 325°F. Grease a 9-inch springform pan and line the bottom with parchment paper.
02 - Combine chocolate cookie crumbs, melted butter, and sugar in a bowl. Press the mixture firmly into the bottom of the prepared pan. Bake for 10 minutes, then remove and allow to cool.
03 - In a large bowl, beat softened cream cheese with sugar until smooth and creamy. Add eggs one at a time, mixing thoroughly after each addition.
04 - Blend in sour cream, vanilla extract, peppermint extract, and salt until just combined, avoiding overmixing.
05 - Pour the filling over the cooled crust and smooth the surface. Bake for 45 to 50 minutes, until the edges are set and the center is slightly jiggly.
06 - Turn off the oven, crack the door open, and let the cheesecake cool inside for 1 hour.
07 - Remove from oven, run a knife around the edges to loosen, then cool at room temperature. Refrigerate for at least 3 hours or preferably overnight.
08 - Whip heavy cream with powdered sugar and peppermint extract until stiff peaks form. Spread or pipe evenly over the chilled cheesecake.
09 - Sprinkle crushed peppermint candies over the topping just before serving.